Patent GB-334653-A (GB)
Title: Improvements in printing punch mechanism
Filed: 1929-07-01
Abstract: 334,653. Triggs, W. W., (Accounting & Tabulating Machine Corporation). July 1, 1929. Record-controlled type-wheel machines. - A card is punched to give a record, and the perforations made are used to guide mechanism giving a second record, e,.g. printed, on the same card of the same data. Cards are fed singly from a magazine 10 by a picker blade 18 operated from a main shaft 23 to feed-rollers 15 and a registration passage 24 of the punching unit, wherein they are positioned by a stop 25 so that the card-punch positions are in line with punches 26 above and holes in a die 28 below. The punches are set by bars 31 upheld by springs and depressed by spring-pressed plungers 38 actuated by a keyboard on a carriage 37 travelling by steps, the depressed bars 31 being held down by a latch plate 34. When the punches are set, the die 28 is raised on depressing a key, the die being reciprocated by an arm 40 actuated by a cam 42 on the main shaft. The punched card is fed to an analyzing unit comprising plates 45, 46 perforated to conform to the card punch spaces and allowing the passage of spring-pressed pins through the card perforations. These pins project into the paths of bars 51 pivoted each to a rack 55, which can rotate a corresponding type-wheel 54 to bring a desired type into printing position. The travel of each rack, and therefore the type chosen, is determined by engagement of one of two lugs 52, 53 on the end of the corresponding bar 51 with the pin projecting into its path. In zero position the lug 52 engages the end of the plate 45, the bar being retracted by a spring 49. The end pin 48 of each row is the longest, and when it is operates with another pin of the row it raises the bar 51 so that this other pin engages the lug 53; when used alone the largest or any other pin engages the lug 52. The bars are moved, when unlatched by the pins, by rock levers 57 connected by pin and slot to the racks 55 and independently mounted on a shaft 58, the opposite arms 60 of the levers being connected by tensions springs 61 to a fixed part. The release and return of the levers in timed relation with the other steps of the process are effected by a cross rail 63 supported between end plates oscillated about a pivot 65 by rollers coacting with a cam 68 actuated by a link 70. The printing is effected on the margin of the punched card resting on the plate 72 after transfer from the analyzer. Each type-wheel is carried by a striker bar 73 sliding in guides and pivoted in an arm 76 fulcrumed in a common spindle 77 and connected by a tension spring to a bar 79 mounted on arms 80; these arms are pivoted on an axis close to the connection of the springs with the arms 76, and oscillated by a rod and slot connection with a rock arm 83 actuated by a pin 84<1> on the cam 68 and returned by a spring 86 when released. The bars 73 are normally held raised by latches on bars 90 engaging keepers 87 on bars 73, the bars 90 being released by a trip bar 93 common to all the latch bars, which reciprocates in a slot spaced from the bars actuating them through detents 96 actuated through rollers 100 engaging shoulders 102 on the rock bars 55.